What's the weight on the 4 rechis? I've got one of Copelands largest 110v reciprocating compressors sitting at my feet. Model number RS97C1E-CAA 1.5hp 115v-1ph 9590btu/h with a 20f evap and 120f condenser while pulling 1940 watts all in a 54lb package. Compare that to 4 rechis or 2 SC18s and I think the Copeland would be more compact and lighter. The only problem is the startup current.. going to need a 30 amp circuit to keep from tripping the breakers.